.side-nav__brand {
  background: url('allure_logo.jpg') no-repeat left center !important;
  margin-left: 10px;
  height: 55px;    
  background-size: contain !important;
}
.side-nav__brand span{
  display: none;
}
.side-nav__brand:after{
  content: "";
  margin-left: 40px;
}